Custom stainless steel water tanks

SYSTEM-TAILORED TANKS FOR
OEM INTEGRATION AND PRODUCT DEVELOPMENT

We design and manufacture custom stainless steel water tanks, including buffer tanks, indirect water heaters and chilled water tanks, for OEM integration and scalable product development. From application-specific projects to dedicated product ranges, ACT supports reliable industrial production.

Custom stainless steel water tanks for OEM systems and scalable product ranges

From geometry and heat exchange performance to connections and insulation

Every tank is engineered for optimal integration into HVAC, heat pump and hot water systems.

Our OEM tank manufacturing approach allows you to scale from prototype to high-volume production without redesign.

Our stainless steel tanks are used in demanding applications where durability, corrosion resistance and consistent performance are critical.

Custom stainless steel water tank range in multiple sizes for OEM systems

All parameters are fully customizable to ensure optimal performance in your specific application

Our approach to OEM tank manufacturing provides full flexibility without compromising production efficiency, repeatability or quality.

The same configurable production platform

supports both project-specific OEM requirements and scalable product ranges for distribution partners.

Our approach to OEM tank manufacturing provides full flexibility without compromising production efficiency, repeatability or quality.

The same configurable production platform

supports both project-specific OEM requirements and scalable product ranges for distribution partners.

For distributors and wholesalers

ACT supports partners who want to expand their offer with dedicated stainless steel tank ranges.
Using the same manufacturing platform, we can help develop dedicated product families aligned with your market, portfolio strategy and long-term supply needs.

→ Dedicated product families

→ Own-brand / private-label potential

→ Scalable production volumes

→ Long-term product continuity

Custom tank dimensions for every application

Our production system supports a wide range of stainless steel buffer tanks and indirect water heaters — enabling precise adaptation to system requirements and available installation space.

Custom stainless steel water tanks in different sizes for application-specific dimensions

Tank capacity range

25–1800 l

Application-specific heat exchanger

We design coil configurations to meet the required thermal performance of your system — whether for indirect water heaters, heat pump buffer tanks or HVAC water tanks.

Depending on the application, tanks can be manufactured as buffer tanks without coils, with a single internal coil, or with a dual-coil configuration

We design coil configurations to meet the required thermal performance of your system — whether for indirect water heaters, heat pump buffer tanks or HVAC water tanks.

Depending on the application, tanks can be manufactured as buffer tanks without coils, with a single internal coil, or with a dual-coil configuration

Coil shapes

Cylindrical, conical or hourglass

Coil diameter range

16–42 mm

Adjustable coil spacing

Optimized for performance and efficiency

Optimized for performance
and efficiency

Internal coil heat exchanger configurations for stainless steel water tanks

Flexible nozzle configuration for system integration

NOzzles Exactly Where Your System Needs It

All nozzles are positioned according to your system layout — ensuring optimal flow, easy installation and seamless integration into OEM products. Connections can be placed on the shell, top or bottom heads, depending on design requirements.

Nozzles can be positioned freely on the shell or on the top / bottom heads, giving you full flexibility in port layout, routing, and installation orientation.

Configurable nozzle positions on a stainless steel water tank for OEM system integration

This allows precise alignment with hydraulic schematics and simplifies system assembly and servicing.

Nozzles can be positioned freely on the shell or on the top / bottom heads, giving you full flexibility in port layout, routing, and installation orientation.

High-performance insulation for energy efficiency

Diameter, Height, and Volume Range

We apply PUR foam insulation to ensure low heat loss and compliance with energy efficiency requirements for hot water storage tanks and HVAC systems. Encased in a durable outer jacket for long-term performance and clean finish. Optimized insulation improves thermal efficiency, reduces energy losses and supports compliance with modern system standards.

PUR foam thicknesses

50/75/100 mm

Insulated stainless steel water tank with PUR foam for improved thermal efficiency

Custom stainless steel tanks for HVAC, heating and energy systems

ACT designs and manufactures stainless steel water tanks for a wide range of applications, including HVAC systems, heat pumps and domestic hot water installations.

Our portfolio includes stainless steel buffer tanks, indirect water heaters and chilled water tanks — all developed in the OEM model and tailored to your system requirements.

We also deliver custom stainless steel pressure tanks designed for specific performance, durability and integration needs. Each tank is engineered individually to ensure optimal thermal performance, system compatibility and long-term reliability.